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19

In Lma'an Yishme'u #267 (page 2) Rabbi Chaim Hillel Raskin says that it is a Halachic obligation to quiet or turn off a cell phone before starting to Daven. If he did not, and his cell phone rings, he is allowed to quiet or turn off the phone to ensure that no one will be disturbed further. Although he doesn't specifically address a situation where it hasn'...


12

I wrote to Business Halacha Institute and they answered that it is prohibited to do so. As requested, here is the conversation: Aside from the secular law ramifications (illegal in the US): I would be interested in knowing how cell phone jammers fit into halacha, and what the reasons behind forbidding [or permitting] their use would be. Also of ...


9

Ultimate Zmanim for iOS has that feature. With Zmanim Alarms, Ultimate Zmanim can remind you of important zmanim throughout the day. Shema, Tefila, and weekly candle lighting are all covered. (To forewarn the question, on Android, Halachic Times is an equivalent).


9

In his responsa (Tzitz Eliezer 10:47) R. Waldenburg quotes some authorities who maintained that in a state of emergency one can direct by telephone to write a get for his wife without even appearing before Bet Din. Others maintain that witnesses would be required to validate that the husband is the one on the phone directing.


8

OnYourWay (Uvelechtecha Baderech) contains a large number of Torah texts for free. It was originally made for the iPhone, but is now available on Android also (though its interface is a bit more difficult to use).


8

No sources so please CYLOR but: The voicemail goes to a central server at your provider. When you dial in to retrieve your messages you are not accessing a message store on your phone rather you are dialing into a VM service. Since this server/service is maintained for both Jewish and Non-Jewish customers it would be permitted to have benefit from it even ...


7

There is a prohibition of "Ona'at Devarim" - "Verbal Oppresion". This prohibition emanates from two closely placed verses - Vayikra 25:14 and 25:17 that state "Do not aggrieve one another." This article details the applications of "Ona'as Devarim". In summary, the caller expected to make a sale. Your attempting to play jokes on him most likely aggrieved him ...


7

I would assume it depends on what's considered a normal form of transaction. If any action is recognized by society as a form of transaction, halacha recognizes it -- this is known as kinyan situmta. But Rambam and Shulchan Aruch rule that if you use "word alone" to commit to buying or selling (without any language of oaths), "though you have made no mark ...


6

Orayta Jewish Books has what seems to be a phenomenal set of Jewish books in its app. I don't have it myself, but I'm very tempted to not only download it, but to donate to the developers as well.


6

I would like to add that the mishna brura in 'סימן שח' סעיף קטן יב says that one should not use an item that is a kli shemelachto lissur if a kli that is muttar is available. So this question can only be relevant if one doesn't have a watch.


6

Before discussing praying on a smart phone, there is the question of even having it enter the synagogue. Sephardi Chief Rabbi of Israel, R. Yitzhak Yosef (the son of R. Ovadia Yosef), considers some problems related to the subject in his Yalkut Yosef (O"H 151:29): מי שיש לו מכשיר טלפון נייד [פלאפון] צריך לכבותו קודם שיכנס לבית הכנסת, כדי שלא יצלצל באמצע ...


5

If the charger has an indicator light it would obviously be forbidden as unplugging would extinguish it. Even if not, phone chargers utilize electricity even when the phone is not plugged in. Consequently unplugging would interrupt the flow of electricity and would most probably be forbidden on Shabbos under the general minhag/uvdin dechol prohibition of ...


5

Smart siddur lite is a free Android siddur app which allows you to adjust font size with finger gestures. It also allows you to choose your nusach as well as some settings for which prayers to show. Choose the tefila you are interested in and it automatically adjusts the text for rosh chodesh, chol hamoed, etc. that are relevant to the current date and ...


5

I don't have sources, but I offer the following reasoning: There is no issue of erasing with digital representations of the divine name. Text on a screen is neither permanent nor writing. Nobody (as far as I know) bars bringing your smartphone into a bathroom. Nobody (as far as I know) requires burying a phone when it will no longer be used. R' Yosef ...


5

I have used RustyBrick's iOS siddur for years. Here is how it fares against your criteria: it has all nusachim (ashkenazim, sefard, edot hamizrach, chabad) and you can choose which one you want at any point in time (i.e., it only shows one at a time) it has all prayers recited on any weekday, incl. special days (e.g., fasts, Rosh Hodesh) - it has an option ...


4

The Lubavitcher Rebbe wrote (with regards to Megilla, Shofar, and Gittin) that in contrast to an acoustic hearing aide whose amplified sound is connected to the original sound, a sound produced through a microphone (or telephone) has no halachic connection to the original sound. A microphone (or telephone) works by a voice changing the electric current ...


4

My father and i both use AndDaaven. It is nusach Ashkenaz with adjustable font. It has all 3 tfilot, plus bentching. It does not have instructions though. On my iPad, i use the app "On Your Way -- ובלכתך בדרך", which is also available for Android. I haven't used the 'Droid version, but on iOS, it has all nuschaot, adjustable size, but still no instructions....


3

There is a new free daf yomi app called "portal hadaf hyomi" The App includes many great features: The entire Talmud in clear fonts Talmud lessons to listen to and download, in Hebrew, English and Yiddish Articles, Leaflets,books and other helpful tools A location map for venues in which you can attend "Daf Hayomi" lectures A Calendar with enables the user ...


3

I vote for creating an app for this site!


3

If I may toot my own horn, I have an app, "Real Clear Daf," which is packed with features to facilitate your Gemara learning (e.g. dictionary, blog, note-taking, audio shiur, etc.). It's available for both Android and Apple and it's absolutely FREE! Links to the App: https://play.google.com/store/apps/details?id=com.realcleardaf.mobile&hl=en https:/...


3

Regarding your first question, it is mostly prohibited with some possible exceptions (CYLOR before doing this in practice). I have bolded the specific issues identified by these poskim. Nearly all these issues apply to your second question as well. R Shlomo Dichovsky (“Ha’azanat Seter” in Torah Shebe’al Peh 35, p. 57) is quoted here as writing Although ...


2

Yes. (Yalkut Yosef Helek 3, 215:4).


2

To my knowledge there was no opposition to utilizing telephones when they were initially introduced, the difficulty is that this in itself does not mean that there was no opposition. Furthermore, if there was no opposition, it could be difficult to demonstrate this fact since it is unlikely anyone would write teshuvos on why they do not object to an item ...


2

I've been using Crowded Road's iTalmud. It had some major issues with download management and audio playback, but a recent update reduced these to minor issues, at least for me.


2

So this is actually several different questions. In order from more to fewer poskim would say "yes": 1) Is it permissible to look at a cell phone that happens to be displaying the time on Shabbos? 2) Is it permissible to pick up your cell phone within your house and move it around for the purpose of having the time displayed elsewhere? 3) Is it ...


2

See Shulchan Aruch CM 227:26 which says that there is no prohibition of Onaas Mamon (money) when done to a goy. This is because of the passuk לא תונו איש את אחיו - A goy is not Achiv. Concerning Onaas Devarim the passuk says LO TONU ISH ES Amiso, which also excludes goyim. BUT See Yam Shel shlomo Baba Kama 10:20 that if a chilul Hashem will be caused it ...


2

I'd reach out to the OU and Artscroll about creating an app for the OU's website and Artscroll's Hebrew-English Siddur. The OU website works fairly well on some mobile platforms (BB being the most notable exception), but an app would be great, especially for their holiday/Zmanim calendar. They also have tons of other content that would be great to access in ...


2

Rabbi Frand mentioned this case in one of his weekly shiurim. He said that someone in the United States can call Eretz Yisrael on Erev Shabbos and leave a message on the machine (or send a FAX) as long as the person in Eretz Yisrael does not read the FAX or listen to the message. Many people turn the answering machine off in order not to accidentally hear ...


2

The siddur in the Apple app. 'OnYourWay - ובלכתך בדרך' fits these criteria.


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